Strain engineering in monolayer WS2, MoS2, and the WS2/MoS2 heterostructure

Xin He, Hai Li, Zhiyong Zhu, Zhenyu Dai, Yang Yang, Peng Yang, Qiang Zhang, Peng Li, Udo Schwingenschlogl, Xixiang Zhang

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摘要

Mechanically exfoliated monolayers of WS2, MoS2 and their van der Waals heterostructure were fabricated on flexible substrate so that uniaxial tensile strain can be applied to the two-dimensional samples. The modification of the band structure under strain was investigated by micro-photoluminescence spectroscopy at room temperature as well as by first-principles calculations. Exciton and trion emissions were observed in both WS2 and the heterostructure at room temperature, and were redshifted by strain, indicating potential for applications in flexible electronics and optoelectronics.

源语言英语
文章编号173105
期刊Applied Physics Letters
109
17
DOI
出版状态已出版 - 24 10月 2016

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